That was exactly what I needed... With the name I was able to find a pdf with all the rules
So many things I have forgotten anyway this was:
#7: Negative Law of Exponents: If the base is powered by the
negative exponent, then the base becomes reciprocal with the
Now I can move forward again, After you get an idea of the boundaries you can then see the relationship between the roots and powers which allows me to prove the law =)
as always this site is great I am going to have to make a donation I think as this is probably one of the best sites I have been on and people are always very helpful.